Clamping mechanism.



D. C. KLAUSMEYER. GLAMPING MECHANISM.

APPL'IGATION FILED sBPmrso, 1912.

1,070,81 5. Panama Aug. 19, 19m

To all 'whom t may concern:

UNITED STATES PATENT oEEioE.

-mitm) o.

KLAUsMEYEmoF OAKLEY, oHIo, AssIGNoR To THE oINciNNATI-BIoK-Foan TOOL COMPANY, OF CINCINNATI, OHIO, A CORPORATION OFV OHIO.-

CLAMPING- lVIEICI-LANISlVI.

Be it known thatv I, DAVID C. IGiAUsigEYEn, a: citizen of the United States, residing at Oakley, Ohio, have invented a new and use-- ful Improvement in Clamping Mechanisms,

of which the ollowing is a specication.

My invention-relate'sto clamping mecha nisms of the class-adapted to the use of machine tools or for other suitable purposes` and the objects of my improvements 4are to provide lpower actuated'mechanism for securelyclamping a sleeve in diterent rotative positions upon a concentric cylinder; to provide `extensible operating connections lwith said mechanismfor convenience, of access to the operator in different positions; to'include within said mechanisma fluid pressure motor ofnovel construction, and

to Aprovide simple and durable construction and assemblage of the various parts for securing, facility of operation together `Withaccuracy. and eiiiciency of action.y These objects may be attained inthe following described manner'asillustrated in, the accompanyingdrawings, in which: L

Figure lrepresents a side elevation of .portions of a radial'- drill provided with my improvements; ]3`ig 2 a rea'r elevation.; Fig.-

3 a longitudinal section of the motori; Fig; 4 a plan ofthe raclgandsegniental pinion.

'with connecting meii'ib'ers in section; Figs. -51 Land 6, transversmsections of the four way .7 adetail with parts iirseotion ofthe clampcock, in diieierlt positions, and Fig.

ing portion of the sleeve.`

the driving sha-ft having connections means of the lscrew' 7 theshiftingrrod for engaging' or disengaging said screw with the driven gears within thev gear box 4; 9- the gear box for the drill spindle l.11; saidv box being supported-on 'theradial arm by moans of thesaddle 12 which is movable' o n the `arm guides 13 by meansof a pinion en-v gaging with the rackv14 and actuated by -spreadof the wings apart.

the hand wheel 15, all being-- constructed and arranged in .the ordinary manner.

The sleeve 3 is formed with wings 16,

' and 17 in .its lower portion by means of tthe vertical 'and transverse slits 18 andA 19 through its rear wall. 'An eccentric shaft Specication of Letters Patent.' r Patented Aug'. 19, 1913. l `Application leid September 30, 1912. Serial No. 723,098. -4

21 journaled in bearings 22 formed onthe i wing 16is provided with' the eccentric collar 23.' The clamping screw. 24l inserted .through the projecting boss formed on the wing 17 is adjustably secured to the 4collar 23. Screws 26 inserted .through vthe boss 25f and adjustably engaging with the respective bearings 22 serve to limit the For thin sleeves on small drills adapted only to perform light duty a hand leverl may be suiiicient to' turn the eccentric shaft with the eccentric collar 23 on the center as shown in Fig. 2, which causes the clamping screw 24 when properly adjusted to move and maintain the wings immovably clamped on the contiguous surface of the`colur'nn. On drills or tools oflarge size, however, which are intended for heavy duty, it is desirable to utilize power for contracting the heavy wings int-o immovable clamping engagement with the column.

`The motor 20 adapted tothe use of airor other elastic fluid under pressure,V may -be secured on the collar of the radial arm by means of the bracket 27, Said motor consists of the cylinder'28 wherein the piston 29 provided with oppositelydisposed piston y rods'31 and 32 may be reciprocated. The

In .the drawings lrepresents the base of a radial drill; 2 the-cylindrical column;. 3 the sleeve rotatively adjustable thereon;- 4 the gear box mounted on the sleeve; 5A

.38 and 39' which vdepend from the respective ends of `the motor-.is secured at its ends to the respective piston rods 31 and 32 by means of the brackets 41 and 42 and is movable therewith.4 A segmental gear 43 journaled in a bearing 44 secured .to lthe l collar of the radial arm is splined on vthe eccentric-shaft 21 and engages with said rack. A four way cock 45 secured on the radial-arm by means of the bracket 46 is CII in Fig. 3'.

Iend of the cylinder.

provided with the stem 47 which is extended the length of said arm. The Ihand, lever 4S splined on said stem is formed with the annular 'dange 49 which engages with a vnotch 5l formedl in the saddle 12 whereby said lever is movable with the saddle to different longitudinal positions on the stem and maintained in the same'position in relation to the spindle 11. Thepipe 52 leading from the rear end of the cylinder isV extended through an opening53 formed in the radial arm' and communicates with the port 54 oli the four way coclr 45'and the pipe 55 leading from the front end of the cylinder communicates through the port 56 with said coclr. 57 represents the discharge port and 58 the inlet port of cock 45 which communicates through the pipe 59v with a source (not shown) of iiuid under pressure.

In operation, when the four way cock is turned by means 'of the hand lever 48 into thepositionshownin Fig. 6 the compressed air is admitted 'fromthe-pipe59 through the ports 58 and 56 of thecock 45 and through the pipe 55 to the motor for driving the piston toward the the rear end thereof, as .shown The rack being actuated with the piston serves to turn the segmental gear and the eccentric Vshaft 21 with the collar 23 on its center as shown in Fig. 7 whereby the screw 24 is caused to contract the wings 16v and 17 and thereby securely clamp the.

sleeve on the column in predetermined positions ot' rotative adjustment thereon.

The movement oi the hand lever 48 inI the .reverse direction serves to open the discharge from the motor through the pipe 55 and the ports 56 vand 57 of the cock 45 and to admit the fluid to the-rear end of the cylinder 23 through the ports 58 and 54 and the pipe 52, as shown in Fig. 5. rll`he tluid thus admitted serves to move the piston with the rack in'a forward direction for actuating the segmental gear and the eccentric shaft a partial turn whereby the eccentric collar 23 and the clamping screw 24 release the wings .and permit them 4to separate to the limit permitted by the screws 26 and lthus release the sleeve from the column. After the-piston is thus moved a predetermined distance in a forward direction to bring the auxiliary port 83 with the cylinder, as shown by dot- Yted lines in Fig. y3, the iluid is permitted, to

escape therethrough and through the hollow piston rod 32 and port 84 for lessening the torce of contact of the piston with the front lhe adjusting screw 35 serves to control the size of the port 34 to correspond with the duid under diderent pressures. hitter the piston has been actuated in either direction, the hand lever may bemoved to an intermediate position torclosing the tour way cock and preventing the compressed lluid 'from escaping.

nov/dais Having fully described my improvement, G5 what I claim as my invention and .desire to secure by Letters Patent .of the United States is:

l. The combination of a cylinder, a sleeve` formed with a split end portion and rota 70 tively adjustable thereon, an eccentric shaft journaled on one side of the split portion, an eccentric collar thereon, adjustable connections from'said collar with the other side of the split portion of the sleeve, a power ac- 75 tuated.- motor, andra'clr and pinion connections of the shaft therewith.

2. In a radial drill .the combination of a cylindrical column, a sleeve rotatively ad justable thereon, a radial arm' vertically ad- 80 justable on the sleeve, clamping connections of the sleeve with the column, a fluid driven motor secured to the arm, actuating connections therefrom with the clamping connections, a cock secured to the arm for control- 85 for moving and maintaining the lever in'95 constantdistance relations with the spindle, a motor, iiuid connections from the cock therewith, and clamping connections actuated by the motor between the sleeve and column.

4. In a radial drill, acolumn, a sleeve thereon, clamping connections between the sleeve and column, a radial arm adjustable on the sleeve, a saddle adjustable on the arm, a cock secured on the arm and provided with an extended-stem, a lever splined on the stem and movable with-the saddle along the arm and stem, a motor, fluid connections thereto controlled` by the cock, and connections therefrom for actuating the clamping con nections.

5. In a radial drill, the combination of a column, a sleeve thereon, an eccentric shaft on the sleeve, clamping connections of the sleeve with the shaft actuated thereby, an arm adjust-able on the sleeve, a gear journaled thereon and splined on the shaft; a moto-r driven rack engaging with the gear, a drill spindle adjustable longitudinally. on the arm, a coclr secured on the arm for con trolling the motor, and connections `adjust- Aable on the arm with the spindle for actuatthe arm with the spindle, motor, Huid connections from the cock therewith,. and

mechanism actuated by the motor for main# taining the arm in different positions of ad- 5 justment on the support.

7. In a radial drill, the combination with a vertiealsupport, an arm radially adjustable thereon, a saddle adjustably secured on the arm, of a motor, mechanism 'actuated thereby for maintaining thefarm in different 10 .the uid to and from the motor.

DAVID C. KLAUSMEYER. i Witnesses:

S. C.`SGHANER, AUG. '.lUncH'irR.' 

